344639 has 2 divisors, whose sum is σ = 344640. Its totient is φ = 344638.

The previous prime is 344629. The next prime is 344653. The reversal of 344639 is 936443.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344639 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 3⁷ + 4⁴ + 6⁷ + 4⁵ + 3⁷ + 9⁵ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172319 + 172320.

It is an arithmetic number, because the mean of its divisors is an integer number (172320).

2³⁴⁴⁶³⁹ is an apocalyptic number.

344639 is a deficient number, since it is larger than the sum of its proper divisors (1).

344639 is an equidigital number, since it uses as much as digits as its factorization.

344639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 344639 is about 587.0596221850. The cubic root of 344639 is about 70.1113194759. Note that the first 3 decimals are identical.

The spelling of 344639 in words is "three hundred forty-four thousand, six hundred thirty-nine".